An air at $30$oC and $50\%$ RH is initially used in an air dryer, which is heated to $110$oC$.$

The heated air at a flow rate of $1,800$ m$3/$hr is passed over a set of trays in a dryer and leaves at

$60\%$ RH$.$

$($a$)$ Determine the energy required to heat the air.

$($b$)$ Calculate the quantity of water removed per hour.